Um automóvel percorre uma estrada com função horária s = - 40 + 80t, onde s é dado em km e t em horas. Qual o instante em que o automóvel passa pelo km zero?

explanation:

v=uf/(u-f)

= 5.-10/(5+10) convex lens has negative focal length

not too sure thinking all accelerations are pointed down

t = 1/400 h   ⇔ 0.0025 h ⇔ 9s ⇔ 0.15 m

any of the answers are correct.

in order to follow the instructions and complete the statements, i need to use data from table c of your student guide. can you think of a way to let me see your student guide for a while ? i can't answer the question without the data in table c.